Prep CHANGELOG.md for release v3.5.8.

Author: benjamn

CHANGELOG.md

@@ -1,10 +1,12 @@
-## Apollo Client 3.5.8 (unreleased)
+## Apollo Client 3.5.8 (2022-01-24)
 
 ### Bug Fixes
-- Fix the type of the `called` property for `useQuery()`/`useLazyQuery()`. <br/>
+
+- Fix the type of the `called` property returned by `useQuery()` and `useLazyQuery()`. <br/>
   [@sztadii](https://github.com/sztadii) in [#9304](https://github.com/apollographql/apollo-client/pull/9304)
 
 ###  Bug Fixes (by [@brainkim](https://github.com/brainkim) in [#9328](https://github.com/apollographql/apollo-client/pull/9328))
+
 - Fix `refetch()` not being called when `skip` is true.
 - Fix the promise returned from the `useLazyQuery()` execution function having stale variables.
 - Fix the promise returned from the `useLazyQuery()` execution function not rejecting when a query errors.